Tribological characterization of epoxy coatings modified with ionic liquids and graphene

• Published in: Tribology international 2020-09, Vol.149, p.105516, Article 105516
• Main Authors: Avilés, M.D., Jiménez, A.E., Saurín, N., Carrión, F.J., Sanes, J., Bermúdez, M.D.
• Format: Article
• Language: English
• Subjects: Austenitic stainless steels; Coefficient of friction; Epoxy coatings; Epoxy resin; Epoxy resins; Fluorine; Friction reduction; Graphene; Ionic liquids; Ions; Low carbon steels; Monolayers; Solvents; Spin coating; Substrates; Tribology; Wear
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2018.12.016

The tribological performance of new epoxy resin (RE) coatings on mild steel AISI 1015 substrate has been studied under pin-on-disk configuration against AISI 316L stainless steel. Both single layer and double layer coatings were obtained by spin coating and curing. A single layer coating of RE modified by a dispersion of graphene (G) in the aprotic ionic liquid 1-octyl-3-methylimidazolium tetrafluoroborate, RE+9 wt.%([OMIM]BF4+0.1 wt.%G), prevents wear and reduces the coefficient of friction in a 60% with respect to RE. When the fluorine-free protic ionic liquid bis(2-hydroxyethyl)ammonium oleate (DO) is used, a double layer coating is necessary to achieve wear prevention and friction reduction up to 70% for RE+9 wt.%DO, and up to 50% for RE+9 wt.%(DO+0.1 wt.%G). [Display omitted] •Epoxy resin nanocomposite coatings have been applied on a mild steel substrate by spin coating and curing.•Ionic liquid and graphene reduce friction coefficient a 60% with respect to neat epoxy coating and prevents wear.•Double layer coating with oleate protic ionic liquid prevents wear and reduces friction coefficient a 70%.